Hi, I usually travel from Islamabad to Karachi and back to Islamabad once a year.
Previously I had Honda City 2007 on petrol and now I have the same vehicle of 2011 model on petrol. I made my last trip in July 2011.
From Karachi to Islamabad, i have made the refuelling which is as follows:
1. First refuel - 22 litres at Morro after driving 342km from Karachi
2. 2nd refuel - 24 litres at Zahirpir after driving 738km from Karachi
3. 3rd refuel - 23 litres at Okara after driving 1122km from Karachi
4. 4th & last refuel - 8 litres on the first fuel station stop of M2 motorway after driving 1345km from Karachi.
In my previous 3 trips, I left Karachi early morning around 5am and experienced police interruptions on the super highway but in my last trip of July 2011, I left Karachi at 8am and there was no police on super highway.
All the relevant documents should be in the vehicle, like registration book, insurance papers, driving license etc. In some cases Police also ask for NOC for moving your vehicle from Sindh to Punjab. This is usually happen in Sindh. I am not sure how important this document is, but i have prepared one for my vehicle.
Road conditions are good. In terms of comparison, highway of Punjab is better than Sindh.
Do cross Sindh within day time (max. by evening). If you dont have GPS device, then you can try google maps on your mobile.
Follow the directional signs and stay on N5 (main highway).
Drive carefully and keep a reasonable distance with heavy trollers, trucks etc.
Out of 4 trips, the last 2 trips were non-stop and i was the only driver.